<!DOCTYPE HTML>
<html>
<?php 
session_start();
$aceptado=null;
if(isset($_GET['a']))
	$aceptado= $_GET["a"];

?>
<head>
<title>Admin </title>
<meta charset="UTF-8" />
<link rel="stylesheet" type="text/css" href="css/resett.css">
<link rel="stylesheet" type="text/css" href="css/structure.css">
</head>

<body>
<form class="box login" action="validar.php" method="get">
	<fieldset class="boxBody">
	  <label>Matricula</label>
	  <input type="text" name="usuario" tabindex="1" value="<?php echo $aceptado;?>" placeholder="usuario" required >
	  <label><a href="#" class="rLink" tabindex="5">.</a>Password</label>
	  <input type="password"  name="pas" tabindex="2" required>
	</fieldset>
	<footer>
	  <input id="a" type="submit" class="btnLogin" onclick='myFunction()' value="Login" tabindex="4">
	</footer>
</form>
<footer id="main"></footer>
</body>
</html>